package com.gitee.hifong45.annotations;

import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.OutputStream;

@Component
//@Deprecated
public class AccessLimitInterceptor extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断请求是否属于方法的请求
        if(handler instanceof HandlerMethod){

            HandlerMethod hm = (HandlerMethod) handler;

            //获取方法中的注解,看是否有该注解
            AccessLimit accessLimit = hm.getMethodAnnotation(AccessLimit.class);
            if(accessLimit == null){
                return true;
            }
            // int seconds = accessLimit.seconds();
            int maxCount = accessLimit.maxCount();
            boolean login = accessLimit.needLogin();
            //如果需要登录
            if(login){
                //获取登录的session进行判断
                //.....
                String key = request.getRequestURI();
                key += ""+"1";  //这里假设用户是1,项目中是动态获取的userId
            }

            //从redis中获取用户访问的次数
//            AccessKey ak = AccessKey.withExpire(seconds);
        //    Integer count = redisService.get(ak,key,Integer.class);
            Integer count = 10;
            // if(count == null){
                //第一次访问
                // System.out.println("第一次访问");
//                redisService.set(ak,key,1);
            // }else 
            if(count < maxCount){
                //加1
//                redisService.incr(ak,key);
            }else{
                //超出访问次数
                render(response); //,CodeMsg.ACCESS_LIMIT_REACHED); //这里的CodeMsg是一个返回参数
                return false;
            }
        }
        return true;
    }

    private void render(HttpServletResponse response) throws Exception {
        response.setContentType("application/json;charset=UTF-8");
        OutputStream out = response.getOutputStream();
        String str  = "this is result";
        out.write(str.getBytes("UTF-8"));
        out.flush();
        out.close();
    }
}
